Apparatus for determining the distance between a pair of surface

Details Apparatus for determining the distance between a pair of surface Apparatus for determining the distance between a pair of surface

1989-12-04

1991-05-14

Williams, Hezron E.

Measuring and testing

With fluid pressure

Dimension, shape, or size

G01B 1312

Patent

active

050145460

ABSTRACT:
In order to ensure that the pressing force exerted during the production of molded objects acts exclusively on the molding compound (34), and is not absorbed by the lands (1a, 2a) the mold halves (1, 2), a distance determining apparatus employs a nozzle (3) bored into one of the lands. The mouth of the nozzle faces the land of the other mold half. The nozzle is connected by way of a hose (5) with a pressure source (9) for a compressible flow medium, such as compressed air. The hose serves as a reservoir for the flow medium. After attaining a starting state in which a predetermined overpressure is applied to the reservoir, the pressure source is switched off by a valve (7), and the time needed for the pressure in the reservoir to drop to a predetermined lower value is measured. This time period constitutes a measure of the distance (x) between the two lands (1a, 2a) of the mold halves.

REFERENCES:
patent: 4076780 (1978-02-01), Ditto

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